Add IntervalMap::const_iterator::atBegin().
It returns true when operator--() can be called. llvm-svn: 138107
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@ -1335,6 +1335,9 @@ public:
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/// valid - Return true if the current position is valid, false for end().
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bool valid() const { return path.valid(); }
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/// atBegin - Return true if the current position is the first map entry.
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bool atBegin() const { return path.atBegin(); }
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/// start - Return the beginning of the current interval.
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const KeyT &start() const { return unsafeStart(); }
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